Fix panic when remote differ returns empty result

dmcgowan · thaJeztah · commit e134b639396a · 2023-06-02T11:34:38.000+02:00
Signed-off-by: Derek McGowan <derek@mcg.dev> (cherry picked from commit 0d97523) Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
diff --git a/diff.go b/diff.go
@@ -105,6 +105,9 @@ func (r *diffRemote) Compare(ctx context.Context, a, b []mount.Mount, opts ...di
 }
 
 func toDescriptor(d *types.Descriptor) ocispec.Descriptor {
+	if d == nil {
+		return ocispec.Descriptor{}
+	}
 	return ocispec.Descriptor{
 		MediaType:   d.MediaType,
 		Digest:      digest.Digest(d.Digest),

Original file line number	Diff line number	Diff line change
`@@ -105,6 +105,9 @@ func (r *diffRemote) Compare(ctx context.Context, a, b []mount.Mount, opts ...di`
`105`	`105`	`}`
`106`	`106`
`107`	`107`	`func toDescriptor(d *types.Descriptor) ocispec.Descriptor {`
	`108`	`+ if d == nil {`
	`109`	`+ return ocispec.Descriptor{}`
	`110`	`+ }`
`108`	`111`	`return ocispec.Descriptor{`
`109`	`112`	`MediaType: d.MediaType,`
`110`	`113`	`Digest: digest.Digest(d.Digest),`